Dear All,
ASHRAE 90.1-2007 minimum EER and COP ratings for heat pumps in Table
6.8.1B. The referenced testing is ISO 13256-1 and the rating condition
is 59F entering water for cooling and 50F entering water for heating.
What is the exact definition of "entering water"? Shouldn't both
entering water and leaving water temperatures be specified (in other
words delta T) for a meaningful efficiency requirement?
Thanks
?mer Moltay
